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Brief Overview of the Arctic Mediterranean Seas Data in CARINA

Brief Overview of the Arctic Mediterranean Seas Data in CARINA. Are Olsen, Robert Key, Eva Falck, Emil Jeanson, Anders Olsson, Sara Jutterström, Leif Anderson, Ingunn Skjelvan, Benjamin Pfeil, Jon Olafsson, Thorarinn Aranarson. GLODAP (Key et al.) data in the Arctic.

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Brief Overview of the Arctic Mediterranean Seas Data in CARINA

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  1. Brief Overview of the Arctic Mediterranean Seas Data in CARINA Are Olsen, Robert Key, Eva Falck, Emil Jeanson, Anders Olsson, Sara Jutterström, Leif Anderson, Ingunn Skjelvan, Benjamin Pfeil, Jon Olafsson, Thorarinn Aranarson

  2. GLODAP (Key et al.) data in the Arctic • Only ~20 stations north of Greenland Scotland ridge. • None in the Arctic!

  3. Arctic Mediterranean Seas Data in CARINA Region: Nordic Seas Arctic Ocean Baffin Bay, Canadian Archipelago Data from 53 cruises, 1982 – 2003

  4. Arctic Data SBI - spring AOS 94 Polarstern 96 Northwater Polynya Oden 91

  5. Arctic Data SBI SUMMER SBI - spring Tundra 94 JOIS 97 AOS 94 Polarstern 96 Polarstern 93 Northwater Polynya Oden 91 YMER 80

  6. Nordic Seas data Northeast water Polynya Norwegian Projects 99-02 Hudson 82 Since early 90’s: ESOP1 ESOP 2 TRACTOR IMR/PMEL/Brookhaven/Kiel tracer data Iceland time series

  7. Issues • Precision • Accuracy • Trends

  8. precision/accuracy/trends

  9. precision/accuracy/trends null out imprecise data

  10. precision/accuracy/trends 1982 2002 2160 2160

  11. precision/accuracy/trends 110 crossover analyses for each of DIC, At, nutrients, Salinity, oxygen, CFCs, 300-400 km radius, >2000 m, mostly Greenland Basin. Totalling 660 results Adjustments from first inversion of crossover results ’82 cruise 20 % = 2 mmol kg-1 -20 % = -2 mmol kg-1

  12. precision/accuracy/trends 1982 2002 -20 mmol/kg 2160 2160 DIC DIC

  13. precision/accuracy/trends 1982 2002 -20 mmol/kg -25 mmol/kg 2160 2160 DIC DIC

  14. precision/accuracy/trends Locking points. Use these to define any trend and evaluate adjustements in light of this

  15. Summary • Data from 53 cruises covering Nordic Seas, Arctic Ocean and marginal seas have been gathered in one collection. • Where possible (depends on region) the quality of data has been assessed. • Xover analysis and inversion is being carried out to ensure internal consistency and determine adjustments. • Other methods: MLR, basin averages • Have to be careful and not overdo so trends are preserved, this is the tricky part.

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